Mathematics
NULL
Medium
Question
Pipes A and B fill a cistern in 8 and 24 minutes. Opened in alternate minutes, in how many minutes is the cistern full?
A
6 min
B
12 min
✓ Official correct answer
C
19 min
D
10 min
Community credibility
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A
6 min
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B
12 min
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C
19 min
No member explanations yet for this option.
D
10 min
No member explanations yet for this option.
Explanation
Every 2 minutes they fill 1/6. After 12 minutes the cistern is full. Answer: 12 min.